Lightly season salmon with salt and pepper. Heat olive oil in large nonstick skillet over medium-high heat. Add salmon; cook 8 to 10 minutes or until salmon flakes easily when tested with a fork, turning once halfway through cooking. If salmon browns too quickly, adjust heat to medium.
Transfer salmon to serving platter. Add tomatoes, jalapeno, and butter to skillet; cook and stir 1 minute. Spoon over salmon; sprinkle cilantro. Serves 4.