Our Homemade Sloppy Joes

1 tsp olive oil
2 c. chopped mushrooms
1 c. diced onion
1/2 c. diced green bell pepper
1/4 c. diced celery (optional)
1/2 c. diced carrots
2 cloves minced garlic
2 c. textured soy protein or 1 can lentils, drained
2-4 Tb Ketchup
1 Tb red wine vinegar or apple cider vinegar
1 Tb Worcestershire sauce
1 - 2 Tb dried oregano
1/4 tsp black pepper
1/2 tsp salt
1/4 - 1/2 tsp cayenne pepper
1 (8 oz) can no-salt-added tomato sauce

Heat oil in a large skillet over med-high heat. Add onions and bell peppers and saute until tender. Add remaining ingredients. Bring to a boil, cover, reduce heat, and simmer 15 minutes. Serve on toasted whole wheat buns or bread slices. Makes 6-8 servings.