Best Queso Recipe - How To Make Queso Dip

Ingredients

• 2 tbsp. neutral oil
• 1/2 yellow onion, finely chopped
• 1 tsp. kosher salt, divided
• 1 jalapeño, seeded, finely chopped
• 3 garlic cloves, finely chopped
• 1 tbsp. cornstarch
• 1 (12-oz.) can evaporated milk, divided
• 1/4 tsp. paprika
• 8 oz. sharp cheddar, finely shredded
• 4 oz. Monterey Jack cheese, finely shredded
• 1 Roma or plum tomato, finely chopped, plus more for topping
• 1/4 c. finely chopped fresh cilantro, plus more for topping
• 2 tsp. fresh lime juice
• Tortilla chips, for serving