Heat 2 tablespoons oil in a large nonstick skillet with a lid over medium-high heat. Add salmon pieces and half of the sliced garlic in an even layer. Sprinkle with ½ teaspoon each salt and crushed red pepper. Cook, uncovered, stirring and turning occasionally, until the salmon is opaque on all sides and just cooked through, 4 to 5 minutes. Using a fish spatula or tongs, transfer the salmon to a plate.
Without wiping the skillet clean, add 5 cups broccoli, the chopped bell peppers, 1 tablespoon water and the remaining sliced garlic and ¼ teaspoon salt. Cover and cook, stirring occasionally, until the vegetables are tender-crisp, 4 to 5 minutes. Stir in 1½ tablespoons orange juice and 1 tablespoon tamari. Gently fold in the cooked salmon. Divide among 4 shallow bowls; spoon any remaining liquid from the pan over the bowls. Sprinkle with 1 teaspoon orange zest and 1 tablespoon scallions. Recipe developed by Marianne Williams
