In a bowl, combine the tomatoes, shallots, and capers. Add the tarragon, orange zest, and salmon, then the 1/4 cup olive oil. Gently fold the ingredients together. Season with the pepper. Cover and let rest at room temperature for about 1 hour.
Shortly before serving, bring a large pot of water to a boil. Add the remaining tablespoon of oil and the pasta and cook until just tender. Drain the pasta and divide among 4 shallow pasta bowls. Top each portion evenly with the tomato and salmon mixture. Sprinkle each portion with chopped egg and serve immediately.Servings: