Alaska Cod Corn Tortilla Soup

Ingredients

• onions chopped
  ½ cup
• garlic clove minced
  1 unit
• butter
  1 tbsp
• dried oregano
  1 tsp
• ground cumin
  ¾ tsp
• red pepper flakes or to taste
  ½ tsp
• low-salt chicken broth - (14½ oz)
  1 can
• whole peeled tomatoes - (14½ oz) coarsely chopped
  1 can
• frozen corn kernels
  ⅔ cup
• cod fillet - (5 oz ea)
  4 unit
• chopped cilantro for garnish
  1 unit
• tortilla strips
  1 unit