Vegan 'Meat' Sauce on Polenta

Ingredients (10)

• ✓ cooking spray
• + 1 large onion, cubed add to pantry
• + 1 (12 ounce) package vegetarian soy meat crumbles add to pantry
• ✓ 1 (8 ounce) package sliced mushrooms
• + 1 cup tomato sauce add to pantry
• + 2 teaspoons dried oregano add to pantry
• + 1 teaspoon garlic powder add to pantry
• + salt and ground black pepper to taste add to pantry
• + salt and ground black pepper to taste add to pantry
• + 1 (16 ounce) tube prepared polenta, sliced into 12 pieces add to pantry