In a food processor or blender, blend the egg yolks, garlic, lemon juice and tomatoes until smooth and a bit foamy.
Very slowly, add the olive oil, gradually pouring faster, until a thick aioli forms. Season to taste with salt and pepper.
Preheat the oven to 375. Season each filet of fish with garlic powder, then wrap with zucchini slices.
Bake at 375 until fish is cooked through (about 15 minutes). Then turn on the broiler and finish cooking until zucchini is crisp (about 5 minutes).
Drizzle with tomato aioli to serve.