Bring rice, 1 cup coconut milk, and 1/3 cup water to a boil over medium-high heat. Reduce heat to a simmer and cook for time listed on package directions (~40 minutes). Remove from heat and stir once the cooking time has ended and the coconut milk/water have been absorbed by the rice. Set aside.
Pre-heat oven to 425 degrees. Line a baking sheet with aluminum foil.
Slice salmon into 4 equal portions. Arrange on baking sheet and season with seafood seasoning. Bake at 425 degrees for 12 minutes or until it flakes easily with a fork. If baked with the skin on, gently remove the salmon flesh from the skin with a fork. Set aside.
Add mango sauce ingredients to a food processor and blend until smooth. Set aside.
Assemble bowls starting with rice, beans, and cabbage. Add a layer of pickled red onions, then add salmon, mango sauce, and cilantro on top. Add avocado, if desired.