- Make the peanuts: Melt butter over medium-high heat until bubbly, then add spice powder, sugar, and salt, stirring to dissolve. Add nuts and continue cooking and stirring until they have turned light brown, then spoon onto a large baking sheet and allow to cool.
- Make the garlic sauce: Stir together all ingredients until well-combined. Set aside.
- Make the salad: Arrange cucumber on a platter. Toss enough garlic sauce with broccolini to coat well, then spoon over cucumber. Garnish with peanuts, cilantro, and sesame seeds.