Clean the red peppers, deseed them and slice them into small cubes. Clean the mango and slice it into small cubes. Chop a tablespoon full of cilantro leaves. Slice the tomatoes into small cubes. Slice 1 onion into small cubes. Mix all the very well and add the juice of 1.5 limes and the olive oil season well with salt and pepper and a pinch of red pepper flakes (optional). Keep it in the fridge until serving.
Shred the radicchio, very finely, clean it with running water, place it on a plate over paper towels. Reserve until serving.
Clean your shrimps and brush them with some olive oil and season with garlic, salt and pepper and grill them 2 minutes each side.
To serve, put each element on a serving bowl , tray or plate, garnish your table service with cilantro leaves, lime wedges, the marinated onions, guacamole and several hot sauces.