1 large onion, sliced thinly
1 1/2 pounds skinless, boneless chicken breast halves
2 (6 oz each) cans tomato paste
8 ounces fresh sliced mushrooms
1/2 teaspoon salt
1/4 teaspoon pepper
2 cloves garlic minced
1 teaspoon oregano
1/2 teaspoon basil
1 bay leaf
1/4 cup dry white wine
1/4 cup water


Put sliced onion in bottom of slow cooker; top with chicken breast halves. Combine and stir together remaining ingredients. Spread over chicken. Cover and cook on low 6 to 8 hours, or 3 to 4 hours on high. Serve as a sauce for hot cooked spaghetti or similar pasta.