How To make Tomato Basil Sauce For Pasta

1 tb Olive oil
1/2 c Chopped onion
3 lg Garlic cloves, minced
4 Ripe large tomatoes,
Chopped (4 cups) 2 lg Red bell peppers, seeded,
Chopped (2 1/2 cups) 2 c Sliced fresh mushrooms
1/4 c Chopped fresh basil (or
3 tsp dried basil leaves
2 ts Dried oregano leaves
1/2 ts Salt
1/4 c Tomato paste
Heat oil in large nonstick skillet over medium-high heat until hot. Add onion and garlic; cook, stirring occasionally, until onion is soft but not browned. Stir in remaining ingredients except tomato paste. Bring to a boil. Reduce heat to medium; cook, uncovered, for 15-20 minutes or until sauce is thickened and peppers are tender, stirring occasionally. Stir in tomato paste; heat thoroughly. If thicker sauce is desired, puree all or part of sauce in blender container or food processor bowl with metal blade. Serve hot over cooked pasta. Makes 4 Cups