Place all 3 kinds of beans in large mixing bowl and toss with remaining ingredients. Season, to taste, with salt and pepper. Set aside.
Season salmon with cumin, salt and pepper. Heat oil in a large, nonstick skillet over medium heat. Place salmon skin side down in skillet and cook until skin is crisp and golden, about 3 to 4 minutes. Turn fillets over and cook until medium rare, about 3 more minutes.