Step 1
Combine ½ small pink bell pepper, halved, ribs and seeds eliminated, thinly sliced lengthwise, ½ small white onion, halved, thinly sliced lengthwise, 3 garlic cloves, finely chopped, ⅓ cup (evenly packed) finely chopped basil, ¼ cup pink wine vinegar, 3 Tbsp. extra-virgin olive oil, 1 tsp. crushed pink pepper flakes, 1 Tbsp. honey, ½ tsp. Diamond Crystal or ¼ tsp. Morton kosher salt in a medium bowl to mix. Style and season with extra kosher salt if wanted; set bell pepper combination apart.
Step 2
Pat two 1½”-thick bone-in rib-eye steaks (1–1½ lb. every) dry with paper towels; season generously throughout with kosher salt and freshly floor black pepper.
Step 3
Stir ½ cup mayonnaise, a giant pinch of kosher salt, a giant pinch of black pepper, and remaining 3 Tbsp. honey in a small bowl to mix.
Step 4
Put together a grill for prime oblique warmth (for a charcoal grill, financial institution coals on one aspect of grill; for a fuel grill, go away one or two burners off); oil grate with vegetable oil. Grill steaks over direct warmth, turning each minute or so, together with standing it on its aspect with tongs to render fats cap, till browned on all sides, 6–8 minutes.
Step 5
Transfer steaks over to oblique warmth and proceed grilling, brushing with an excellent layer of mayonnaise combination and turning each minute, shifting nearer to or farther away from warmth as wanted to construct even colour and a deep crust with out scorching, till very darkish brown and an instant-read thermometer inserted into the thickest a part of every steak registers 125° for medium-rare (inner temperature ought to climb to about 130° as steaks relaxation), 15–18 minutes longer. (It is best to have used all the mayonnaise combination.) Switch steaks to a wire rack set inside a rimmed baking sheet and let relaxation 15–half-hour.
Step 6
Switch steaks to a chopping board and slice into thick strips. Organize on a platter; sprinkle evenly with flaky sea salt. Spoon reserved bell pepper combination over and prime with basil leaves.
