Samosadilla (Samosa Quesadilla)

Ingredients

• 1 1/2 pounds Yukon gold potatoes, peeled
• kosher salt to taste
• 1 tablespoon olive oil
• 1 tablespoon butter
• 1 large yellow onion, diced
• 1 teaspoon kosher salt, or more to taste
• 1 1/2 teaspoons garam masala
• 1 teaspoon ground cumin
• 1/2 teaspoon ground coriander
• 1/2 teaspoon ground turmeric
• 1/4 teaspoon cayenne pepper
• 1 serrano pepper, minced
• 3 cloves garlic, finely chopped
• 1 1/2 teaspoons finely chopped fresh ginger
• 1 cup green peas
• 2 tablespoons chopped cilantro
• 1 lemon, juiced
• For the Cilantro Lime Chutney:
• 2 small bunches fresh cilantro with stems
• 1/3 cup fresh mint leaves
• 1/4 cup sliced green onions
• 1 serrano pepper, sliced
• 1 limes, juiced, or more to taste
• 1/2 cup plain yogurt
• salt to taste
• 6 flour tortillas, or as needed
• 1 tablespoon olive oil, or as needed