Ingredients
2 tablespoons extra-virgin olive oil
3 1/3 cups red onion, thinly sliced
Water as needed
1 1/4 teaspoons thyme leaves
1 teaspoon sugar
2 cloves garlic, minced
Salt to taste
1 (8-ounce) package cream cheese
1/4 teaspoon pepper
1 teaspoon dry French onion soup mix
1 cup Italian cheese, shredded
1/3 cup mayonnaise
3/4 cup Gruyere cheese, shredded
Crostini or French bread for serving
Directions
Heat oven to 400.
Heat olive oil over medium-high heat in a large nonstick pan; add onions, stirring frequently. (If they start to brown too quickly, add a splash of water to pan.) Cook for 25 to 30 minutes. Add thyme leaves and sugar, and continue to cook until caramelized; reduce heat to medium if needed to avoid burning. Add garlic once onions are caramelized, and cook for 2 minutes; add salt to onions.
Add cream cheese to a shallow pie pan. Add caramelized onions, and stir together until smooth, incorporating pepper and French onion soup mix. Stir in Italian cheese and mayonnaise. Top with Gruyere cheese.
Bake dip for 15 to 19 minutes. Serve with crostini or French bread.