Fajitas

Ingredients

• 1 1/2 lb. sirloin steak, chopped
• 1/4 c. vegetable oil
• 1/4 c. red wine vinegar
• 1 tsp. sugar
• 1 tsp. dried oregano leaves
• 1 tsp. chili powder
• 1/2 tsp. garlic powder
• 1/2 tsp. salt
• 1/4 tsp. pepper
• 10 large flour tortillas
• 2 large onions, sliced
• 2 medium bell peppers, cut in strips
• 2 Tbsp. vegetable oil
• 1 c. shredded cheese
• 8 oz. salsa
• 12 oz. frozen guacamole, thawed
• 3/4 c. sour cream