Shells & Cheese with Chorizo, Avocado and Lime

Ingredients

• 6 ounces pork chorizo (Mexican style, not Spanish), casing removed.
• 1 jalapeño pepper, or 1 small Anaheim pepper
• The zest of 1 lime
• The juice of one lime
• 2 green onions, green parts only, chopped
• 2 cloves garlic, peeled and smashed
• 3 ripe avocados, peeled and pitted, divided
• 16 ounces small shell pasta
• 1 1/2 cups milk
• 2 Tablespoons unsalted butter
• 3 Tablespoons flour
• 1 teaspoon kosher salt
• A few good grinds of black pepper
• 5 ounces extra sharp cheddar, grated
• 5 ounces queso fresco, crumbled
• 3/4 cup chopped cilantro
• Lime wedges and cilantro for garnish