Prepare the Avocado Crema according to the referenced recipe and refrigerate; it can be made up to 8 hours ahead.
Whisk together orange juice, lime juice, minced garlic, cumin, dried oregano, 1/4 teaspoon salt, 1/8 teaspoon pepper, 2 tablespoons chopped cilantro, and 1/4 cup olive oil to make the mojo sauce.
Reserve 1/4 cup of the mojo sauce, then pour the remaining sauce over the salmon fillets and marinate up to 30 minutes while you prep other ingredients.
Preheat your oven to 415°F (210°C) and preheat a grill or grill pan for the pineapple and plantains.
Place marinated salmon on a baking sheet and bake for 10–12 minutes, or until cooked to your preference. Remove and set aside.
Toss pineapple slices and sliced ripe plantain with 2 teaspoons oil. Grill over medium-high heat about 10 minutes, flipping halfway, and brush with 2 tablespoons of the reserved mojo sauce during the last few minutes.
Assemble bowls: divide the cooked rice among serving bowls, then top with salmon, grilled pineapple, plantains, sliced avocado, tomato, steamed greens, black beans, chopped white green onion portions, cilantro, and optional sliced jalapeno.
Drizzle remaining reserved mojo sauce over the bowls, squeeze fresh lime juice, season with salt and pepper, sprinkle crushed red pepper flakes and paprika to taste, then top with Avocado Crema and serve.