Preheat oven to 350 degrees F.
Slice bread into 16 slices, butter
each slice and place on a baking sheet. Toast bread lightly. Remove from oven but leave on baking sheet and set aside briefly.
Heat oil in a hot saute pan and sear
beef on both sides. Remove and let rest.
Mix mayonnaise, egg yolks, and crab boil seasoning. Fold in asparagus and crabmeat, trying to avoid breaking up the lumps of crab.
To assemble, place meat on toast and spoon crab mixture on top. Return to oven to brown crabmeat mixture and serve.
Cook's Note: "Tri-tip" is a small boneless cut of meat from the bottom half of the sirloin