Grilled Bison Burgers

Ingredients

• 2 pounds ground bison, or grass-fed beef
• ½ teaspoon chopped fresh thyme
• ¾ teaspoon ground coriander
• 1 teaspoon Kosher salt
• 1 teaspoon smoked Spanish paprika (pimenton)
• ⅓ cup ice water
• 3 tablespoons red wine vinegar
• 2 tablespoons honey
• 3 tablespoons water
• 1 red onion, sliced paper thin
• ¼ cup aioli or mayonnaise
• 1 tablespoon lemon juice
• 1 tablespoon Sriracha
• 1 avocado, sliced
• Butter lettuce leaves
• 4 Brioche or potato rolls