This is a really tasty appetizer that is a snap to put together. At least three of the five ingredients are kitchen staples, so when you're hungry for something savory with both smooth and crunchy textures, this is your go-to family snack or party starter. Although the yield is approximately 20 servings, most people, depending on their appetite, will easily eat anywhere from two to four pieces, so plan accordingly.
Grease cookie sheet with olive oil and place baguette slices on it. Broil 4-6 inches from heat for 1-2 minutes until toasted. Turn slices over; sprinkle with 1/2 cup of cheese. Broil 1 to 1-1/2 minutes longer, or until lightly browned.
In small bowl, combine mayonnaise, pesto, garlic powder and remaining cheese. Serve with toast slices.