Preheat oven to 400°. Place salmon in an 8-in. square baking dish. Whisk together coconut milk and curry paste; pour over salmon. Bake, uncovered, until fish just begins to flake easily with a fork, 15-20 minutes.
Meanwhile, in a small saucepan, combine rice, broth and pepper; bring to a boil. Reduce heat; simmer, covered, 5 minutes. Remove from heat; let stand 5 minutes.
In a large saucepan, place steamer basket over 1 in. of water. Place green beans in basket; bring water to a boil. Reduce heat to maintain a simmer; steam, covered, until beans are crisp-tender, 7-10 minutes. Toss with sesame oil and sesame seeds.
Serve salmon with rice, beans and lime wedges. Spoon coconut sauce over the salmon.
