Prep all the vegetables by chopping or mincing as directed above. In a large pot, add the olive oil over medium heat. Cook the onions and bell pepper for 3-4 minutes until they begin to soften. Add the garlic and squash, season everything with the chili powder and cayenne, and continue to cook for another 3-4 minutes. Now add the tomato sauce and vegetarian ground beef and cook until everything is well heated. Taste and add salt and pepper as needed.