Orange Cumin Vinaigrette

INGREDIENTS

• 1 1/2 teaspoons Dijon mustard
• 1 1/2 teaspoons grated orange zest
• 1 teaspoon ground cumin, or to taste
• 1/4 teaspoon red pepper flakes, or to taste
• 1 tablespoon fresh orange juice
• 1/4 cup rice vinegar
• 1/3 cup olive oil, or to taste
• 1 pinch salt, or to taste
• 1 pinch ground black pepper