To make the vinaigrette, blend the lime juice, honey, mustard, garlic, salt, black pepper, and cumin together in a blender; stream oil into lime juice mixture while blending until well combined.
Prepare the steak by patting it dry with paper towels. Season both sides with salt and pepper.
Heat a cast-iron skillet or grill over medium-high heat. Add olive oil.
Place the steak in the pan, and cook 2-3 minutes per side for medium-rare, or 4 minutes per side for medium. Remove from pan and transfer to a plate to rest for 5-10 minutes before slicing. After resting, slice into thin strips against the grain.
To plate, squeeze the Mole Negro in the center of a plate and spread into a circle with the back of a spoon. Top with sliced steak and a small handful of dressed micro-greens.