Cook pasta, drain, keep warm. Heat oil in lg skillet over medium heat. Add garlic and shallot. Cook, stirring for 1 min.Increase heat to med-high. Add tomatoes, broth, salt and pepper. Bring to a simmer, cook 1 min. Add clams, cover, cook 2-3 min. Stir in scallops, tilapia and marjoram. Cover, cook until scallops and tilapia are cooked through and clams have opened. Discard any clams that haven't opened. Spoon sauce and clams over pasta. Sprinkle w/ parmesan cheese.