PEPPER STEAK

2 pounds beef sirloin, cut into 2 inch strips

garlic powder to taste  
3 tablespoons vegetable oil
1 cube beef bouillon
1/4 cup hot water
1 tablespoon cornstarch
1/2 cup chopped onion
2 large green bell peppers, roughly chopped
1 (14.5 ounce) can stewed tomatoes, with liquid
3 tbsp soy sauce
1 teaspoon white sugar
1 teaspoon salt

Sprinkle strips of sirloin with garlic powder to taste. In a large skillet over medium heat, heat the vegetable oil and brown the seasoned beef strips. Transfer to a slow cooker.

Mix bouillon cube with hot water until dissolved, then mix in cornstarch until dissolved. Pour into the slow cooker with meat. Stir in onion, green peppers, stewed tomatoes, soy sauce, sugar, and salt. 

 Cover, and cook on High for 3 to 4 hours, or on Low for 6 to 8 hours. 

Note: This is a recipe and photo I got from allrecipes years ago.