Grilled Watermelon Ceviche

Name: Grilled Watermelon Ceviche
Ingredients: 1 mini watermelon (for Grilled Watermelon); Olive oil (for Grilled Watermelon); salt and pepper, to taste (for Grilled Watermelon); Oil for frying (for Fried Plantain Chips); Green plantains, peeled and sliced on the bias (for Fried Plantain Chips); Salt (for Fried Plantain Chips); 1/4 red onion, small dice (for Grilled Watermelon Ceviche); 1/4 cup cilantro, finely chopped (for Grilled Watermelon Ceviche); 1 clove garlic, small dice (for Grilled Watermelon Ceviche); Zest of 1 lime (for Grilled Watermelon Ceviche); 1 cup lime juice (for Grilled Watermelon Ceviche); 1 tsp sea salt (for Grilled Watermelon Ceviche); 1 tsp toasted cumin (for Grilled Watermelon Ceviche); 1 tsp dried oregano (for Grilled Watermelon Ceviche); 1 cup cubed grilled watermelon (for Grilled Watermelon Ceviche)