Cheesy Chorizo Caramelized Onion Dip

This is easy to prepare in advance and keep in a warm oven until your guests (or ravaged sports horde) arrive.  You can use the what meltable cheese you love, or mixes thereof. Flavor with cumin or coriander or chili powder or nothing (as here).  When you can afford the calories, you sportiffs - go for it!
1/2 sweet onion, finely diced, about 1/2 cup
3-inches cooked chorizo, (or andouille) sausage, finely diced
1/2 fresh red chili (or jalapeño) pepper, diced
2 cloves garlic, minced
2 green onions, sliced

1/2 lb cheese, grated (I used half smoked Gouda, half Fontina)
1/4 good real mayonnaise

Preheat oven to 375F. Heat a dash of olive oil in a skillet. Add the onions and cook for about 12-15 minutes over medium heat, gently turning the onions brown to caramelize. Keep heat on medium so as not to over brown (or burn) the edges. Halfway through, add the chorizo. When the onions have turned golden, add the pepper, garlic and half the green onions. Cook another 2-3 minutes.

Toss cheese into a mixing bowl and stir in the cooked onion mixture.

Add the mayonnaise and transfer to a baking dish.

Garnish with the remaining green onions.

Pop dip into oven and bake for about 20 minutes, or until browned and bubbly. Finish under the broiler (optional), watching carefully, if you want an extra browned effect.

Serve with favorite chips or crackers.