Mushroom and Pepper Chicken

Name: Mushroom and Pepper Chicken
Prep time: 15 min
Cook time: 40 min
Total time: 55 min
Ingredients: 3 lbs boneless skinless chicken breast (cubed); 3 Tbsp olive oil; 1 medium onion; 1 green bell pepper; 1/2 pound sliced mushrooms; 3 cloves of garlic (minced or pressed); 16 oz. can diced tomatoes; 8 oz. can tomato sauce; 1 tsp dried oregano; salt and papper