Quick Cured Salmon Steaks with Grilled Tomatoes and Tzatziki

Name: Quick-Cured Salmon Steaks with Grilled Tomatoes and Tzatziki
Ingredients: 1/4 cup packed light brown sugar; 1 tablespoon kosher salt, plus more to taste; 1 tablespoon smoked paprika; 4 (8-ounce) wild sockeye or coho salmon steaks or fillets (1 inch thick); 1 cup plain whole-milk Greek yogurt; 1/2 cup minced seeded unpeeled Persian or English cucumber; 2 tablespoons fresh lemon juice; 2 tablespoons chopped fresh dill; 1 small garlic clove, finely grated; Warm pita wedges and grilled on-the-vine cherry tomatoes, for serving