Baja-Alaska Halibut Sandwich from Waterfall Resort Alaska

Ingredients

• 4 (4 to 6 oz.) Pacific halibut fillets , fresh or thawed
• Kosher salt and black pepper to taste
• 1 Tbsp. ground cumin, divided
• 1/3 cup olive oil
• 3 Tbsp. fresh lime juice
• 1 1/2 tablespoons minced garlic
• 1 cup regular or light mayonnaise
• 2 Tbsp. sweet pickle relish
• 1 Tbsp. Dijon mustard
• 1 Tbsp. cracked black pepper
• 4 ciabatta sandwich rolls, split
• 1/2 cup roasted poblano chilies, peeled, seeded, and chopped
• 8 slices tomato
• 1 cup cilantro leaves