Place all of the vegetables in a large mixing bowl. Season with garlic, salt, black pepper, allspice, and chili flakes. Drizzle with olive oil. Toss the mixture thoroughly to combine.
Line a sheet pan with foil.
Turn seasoned vegetable mixture on to sheet pan. Spread the vegetables out on the pan.
Place pan in oven. Roast for 7 minutes. Remove from oven.
Roast Fish
Cut fish fillets into 2 inch pieces.
Season fish pieces with salt and black pepper.
Place the fish pieces on top of the vegetables.
Return fish and vegetables to the oven. Roast for 8 minutes.