Mix flour, 3 T butter in sautee pan; add milk, stirring, to make white sauce. Add salt, bring to light boil, remove from heat. Mix in lobster (can be fresh or canned). Line baking dish with cracker crumbs (reserve about 1 T), spread 1/2 the lobster mixture on crumbs. To the rest add all other ingredients, mix, and spread in same dish. Bake in oven until warm (about 15 minutes). Serve in casserole dish garnished with asparagus and lemon strips. This mixture can also be served in pastry shells. *"Salsa negra" - I'm not sure what this is. (This recipe is translated from a Colombian cook book, sent to me in Spanish by Barb Day and translated by me, Heather near L.A. 'u' Buen provecho!