4 Tbsp. peeled and chopped Bosc pear (from 1 pear) 4 Tbsp. soy sauce 3 Tbsp. toasted sesame oil 2 Tbsp. light brown sugar 2 Tbsp. minced fresh ginger 3 garlic cloves 4 scallions, thinly sliced, divided 1 lb. cubed steak, sliced into 1/2-in.-wide and 2-in.-long strips 1/2 tsp. crushed red pepper, divided 2 Tbsp. canola oil, divided 1/4 tsp. kosher salt 1 Tbsp. toasted sesame seeds Cooked rice Sliced cucumbers Kimchi Butter lettuce leaves