Beef Enchiladas

Ingredients

• 1 (15 oz.) can tomato sauce
• 1/4 c. oil
• 1 onion
• 1 1/2 c. water
• 1/2 tsp. oregano
• 1 tsp. vinegar
• 1 Tbsp. chili powder
• 1/2 tsp. sugar
• 1/2 tsp. salt
• 1 lb. ground beef
• 1 onion
• 1 Tbsp. oil
• 1 tsp. sat
• 1 pkg. chili mix
• 12 tortilla shells