Drain the roasted red peppers, then chop them into 1/2 inch pieces.
Place the chopped peppers, garlic, and crushed red pepper in a food processor, then process until the ingredients are fully pureed.
Add mayonnaise and pulse blend until fully blended, or place mayonnaise in a bowl and fold the pepper mix into the mayonnaise to create a layered effect for presentation.
Add salt and pepper to taste.
Serve immediately, or for best flavor chill the aioli for at least 1 hour to allow the flavors to meld.