In a large bowl, coarsely mash avocados with lime juice & salt. Stir in garlic, onion, cilantro & diced tomato. Cover & set aside until ready to use,
Plantains
Preheat oven to 375 F. Line a large baking sheet with aluminum foil placed shiny side up. Brush one side of foil lightly with oil.
Peel & slice plantains into 1/3-inch slices. Place the plantains on the oiled side of the baking sheet & roast for about 10 minutes. Remove from oven & with the bottom of a tumbler, ‘squash’ each piece down flat. Thinner = crispier. Season with coarse sea salt.
Brush opposite side of pan with olive oil & add the salmon fillets to the baking sheet. Brush salmon lightly with a bit of oil & season with your choice of seasonings.
Place the salmon & plantains in the oven & roast for about 10 minutes or until salmon flakes when you cut into it & is slightly opaque.
Serve salmon topped with guacamole alongside plantains. Steamed rice compliments this meal as well.