1 (8 ounce) package penne pasta,
2 tablespoons olive oil,
1/2 cup chopped onion,
1 clove garlic, minced,
3 cups chopped tomatoes,
1 cup sliced fresh mushrooms,
2 cups spinach leaves, packed,
salt and pepper to taste,
1 pinch red pepper flakes,
8 ounces feta cheese, crumbled
1- Bring a large pot of lightly salted water to a boil.
2- Cook pasta in boiling water until al dente; drain.
3- Meanwhile, heat olive oil in a large skillet over medium-high heat; add onion and garlic, and cook until golden brown.
4- Mix in tomatoes, mushrooms, and spinach.
5- Season with salt, pepper, and red pepper flakes.
6- Cook 2 minutes more, until tomatoes are heated through and spinach is wilted.
7- Reduce heat to medium, stir in pasta and feta cheese, and cook until heated through.