Cook chicken until it starts to color, about 30 minutes.
Add peppers, onions, and mushrooms. Cook another 30 minutes.
Sprinkle the chicken and veggies with salt, pepper, garlic powder, oregano, and basil, and top with crushed tomatoes. Mix, adding a little bit of water if the sauce is too thick. Cook another 30 minutes.
Serve immediately with your favorite pasta.