Shrimp & Cheddar Snacks

2 C (8oz) shredded cheddar
1 C mayonnaise
1 6 oz can shrimp rinsed & drained, broken
1 small onion finely chopped
1/4 tsp garlic powder
42 sliced snack rye bread, toasted

Combine first 5 ingredients. spread 1 Tbs on each slice of bread, place on ungreased baking sheets. bake at 350 degrees for 7-9 minutes until bubbly