In a large pot of salted water, start by cooking the penne according to the package directions. While the pasta cooks, start on the mushrooms.
Preheat the grill pan, over medium-low heat then add the olive oil. Season the portobello mushrooms on both sides with a touch of salt and Italian seasoning. Then add them to the pan, flipping every 5 minutes. Total cook time for the mushrooms should be about 17-18 minutes. The mushrooms will be done when you press on the center with the tongs and it is juicy and more soft. Remove from pan and set aside. Slice or cube when adding to the pasta.
When the penne is al dente, drain the pasta water and then add it back to the pan.
Add the spinach leaves and sun-dried tomatoes to the hot pasta. Then add the portobello mushrooms. Gently toss to combine. Season with additional salt if needed.
Serve immediately and enjoy!
Notes
Notes:Optional garnishes are crushed red chili flakes or parmesan cheese. Jovial Foods, Barilla and Trader Joe's all make delicious gluten free pastas. You can substitute with any noodle shape you like.You can also substitutes with other vegetables such as red bell pepper, green peppers, zucchini, or regular mushrooms.You can make this lower in carbs if you use less pasta per serving and add additional vegetables. You can bake the portobellos if you don't have a grill pan. Roast them for about 17 minutes at 400 degrees F.Storage: Store any leftovers in an airtight container in the fridge for up to 2-3 days.