Black Bean Tamales

Name: Black Bean Tamales
Ingredients: 1 (8-ounce) package dried corn husks; 2 medium serrano peppers; 1 large clove garlic; 1 small yellow onion, diced; 1/2 cup fresh cilantro leaves and tender stems; 2 tablespoons canola oil; 1 1/2 cups cooked black beans; 1 cup water; Kosher salt; 3 cups corn masa flour; 1 teaspoon baking powder; 1 teaspoon salt; 1/4 cup olive oil; 2 3/4 cups warm water; 1 tablespoon Mexican chile paste, such as Frontera adobo