Portobello Penne Pasta Casserole

  4.5 – 696 reviews  • Vegetable

There is no stirring required for this deliciously creamy and cheesy one-pot chicken orzo recipe! Parsley and spinach bring color, while lemon adds brightness.

Prep Time: 15 mins
Cook Time: 30 mins
Total Time: 45 mins
Servings: 8
Yield: 8 servings

Ingredients

  1. 1 (8 ounce) package uncooked penne pasta
  2. 2 tablespoons vegetable oil
  3. ½ pound portobello mushrooms, thinly sliced
  4. ½ cup margarine
  5. ¼ cup all-purpose flour
  6. 1 large clove garlic, minced
  7. ½ teaspoon dried basil
  8. 2 cups milk
  9. 2 cups shredded mozzarella cheese
  10. 1 (10 ounce) package frozen chopped spinach, thawed
  11. ¼ cup soy sauce

Instructions

  1. Preheat oven to 350 degrees F (175 degrees C). Lightly grease a 9×13 inch baking dish.
  2. Bring a large pot of lightly salted water to a boil. Place pasta in the pot, cook for 8 to 10 minutes, until al dente, and drain.
  3. Heat the oil in a saucepan over medium heat. Stir in the mushrooms, cook 1 minute, and set aside. Melt margarine in the saucepan. Mix in flour, garlic, and basil. Gradually mix in milk until thickened. Stir in 1 cup cheese until melted. Remove saucepan from heat, and mix in cooked pasta, mushrooms, spinach, and soy sauce. Transfer to the prepared baking dish, and top with remaining cheese.
  4. Bake 20 minutes in the preheated oven, until bubbly and lightly brown.

Nutrition Facts

Calories 380 kcal
Carbohydrate 32 g
Cholesterol 23 mg
Dietary Fiber 3 g
Protein 16 g
Saturated Fat 6 g
Sodium 811 mg
Sugars 5 g
Fat 21 g
Unsaturated Fat 0 g

Reviews

Samuel Sheppard
We love, love, love this! I do add an onion, double the garlic, add sundried tomatoes, add Parmesian and because we specifically use skim milk, I use a little less. Maybe that is the difference in having a liquidy consistency for some? I also use fresh spinach. Anyhow, it is amazing! The changes I made were based on other’s reviews and what I thought we would enjoy. Oh, and I also double the mushrooms because we looooove mushrooms. Anyway, I have made it twice in 2 weeks and it is now one of our all-time faves!
Dylan Davis
Agreed with lots of others, despite lots of cheese and Portobello mushrooms it’s very bland
Ashley Johnson
This was pretty tasty. It took me a lot longer than stated to prepare this first time, and I had a kitchen of dishes to wash from preparing it. I cut the butter in half and threw in some more mushrooms with another small clove of garlic.
Cathy Patrick
This is delicious! Made it as written .. I squeezed all of the liquid out of the frozen spinach before adding and the consistency was perfect!
Joseph Zavala
Delicious. I make casseroles or soup for work because they are easy to pack and reheat. I followed the recipe, but added more garlic because I can never have too much! 2 c of milk was perfect! Perhaps some were not cooking it long enough, I’m not sure. For as rich as the flavor is, it is pretty light! This will be a go to for sure! Thanks for the recipe!
Thomas Andersen
I have made this twice using the original recipe.(using fresh spinach) The second time, last night, I added chicken. I cook the fresh spinach with the mushrooms. We love it!
Miguel Novak
i can never make enough of it my kids suck it up wanting more
Russell Harper
I love this casserole. So creamy and the flavors are divine. I just substitute frozen spinach for fresh.
Cassandra Davis
Couldn’t get the kids to eat it because of a ridiculous “gross” factor applied to mushrooms for some reason… But… know they would have liked it. We loved it. Wife and I ended up fighting over the leftovers.
Bryan Hill
I definitely would recommend following the reviews on this recipe that say to cut how much milk you use. I used about 1 3/4 cup and it turned out great. Otherwise it would be way to runny. I cooked some chicken on the side and that was a great addition to the dinner. Would highly recommend this!
Jennifer Harris
We really enjoyed this! I put it together a little differently and added onions, garlic and parsley. I doubled the recipe (except for soy) and used mini penne. It filled the 11×15 (I think that’s the super large size) Pyrex lasagna dish. I sautéed about half a large chopped onion til translucent, added the mushrooms (sliced baby bella) and stirred til they released and cooked off most of their water, then added about 3 TBS minced garlic for a couple of mins. Stirred in the spinach (steam pkg, microwaved and drained), and soy, then spooned all that into a bowl. Made the sauce as directed, adding about a TBS chopped parsley and some black pepper along w/the basil. Once thickened, poured the spinach mixture into the sauce along with about 1/3 of the mozzarella, then added the pasta. Poured into sprayed dish, topped with remainder of cheese. Baked 350 for 20 mins, then turned to broil for a couple mins to brown just a tad. The only critique I can offer is to be sure to salt to taste along the way (the mushrooms, onions, spinach, sauce, pasta). I think it would’ve been kinda bland w/o the salt, onions, garlic and pepper. Otherwise, fantastic! Would be great with maybe a cup or so of a sharper cheese added to the mixture. Loved it!
William Peters
Never can go wrong with this. Tastes great! Might add Chicken Chunks next time
Devin Valenzuela
Whoa, that’s rich! I suggest using at least twice the penne the recipe calls for. Next time I will try using half the amount of margarine and skim milk in the sauce. Sub any kind of Italian cheese you’d like – parm, reggiano, asiago, or a blend.
Steven Taylor
This has become one of my favorite dishes. I make a double batch and freeze individual portions. I eat low carb and even though this is a bit high in carbs I just plan my day and save the necessary carbs for dinner. The only change I make is to use fresh spinach which I cook with the mushrooms and it comes out perfect! I have to admit I thought the soy sauce seemed like an odd ingredient and I almost left it out. Glad I didn’t because it really adds wonderful flavor. My whole family loved this recipe!
Denise Moore
Love this recipe! I added chicken to mine and it was fabulous!! Super easy to make too!
Hannah Rice MD
This tastes so so good, but the texture is a little runny when the recipe is made as is. I have plans to make this again and I will be adding more flour and some cheese variations the next time.
Dr. Robert Allen
Both my husband and I loved this recipe but I did make a few minor changes based on what I had. First, I cut the recipe in half because there are only two of us. I also used cremini mushrooms (basically, baby portobello mushrooms) since I had them. I also used a mixture of cheddar and Montertay Jack cheese as, again, this is what I had. The only change I would make for future meals is to make a bit more sauce. Basically, it was a very tasty dish and I will definitely make again.
Bryan Kidd
This is delicious! I followed some if the other reviewers suggestions and used less milk, added more garlic, and about 1/4 cup of parm and it came out perfect! I also was unsure of the soy sauce but left in as others suggested, I normally don’t use soy sauce but bought low sodium as I didn’t want it to be salty. That worked great, so if you’re sensitive to saltiness, this was a good option. I didn’t have penne, only had rigatoni, delicious! Super easy to prep and make too!
Patrick Boyd
This was supper good. The family really enjoyed it. I did add some chopped fire roasted tomatoes. I will make this again.
Steven Stephens
So this is interesting. The recipe in the Plant-Based Recipes magazine that I bought did not have soy sauce as an ingredient, so I didn’t add it. I did add much more salt – 2 tsp, vs. 1/2 tsp as written. I also sautéed the mushrooms in the butter with the garlic and the basil. I removed the mushrooms, leaving the butter, to finish my white sauce.
Patrick Lucas
I have made this recipe many times for my family, and they love it!! Takes some concentration, but pretty simple tasks, and tastes so yummy! I love adding more mushrooms, but that’s just me 🙂 Definently recommend!

 

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