May 20, 2026

Roasted Onion and Garlic Tomato Dip

Name: Roasted Onion and Garlic Tomato Dip
Prep time: 10 min
Total time: 40 min
Yield: 6
Ingredients: 1 large red onion, cut into wedges; 6 whole cloves garlic; 2 tbsp (30 mL) olive oil; 1 can (283 g) Ro*Tel® Original Diced Tomatoes & Green Chilies, drained well; 1 tbsp (15 mL) lemon juice; 1 cup (250 mL) grated Parmesan cheese; 1/2 cup (125 mL) mayonnaise; 1/2 cup (125 mL) sour cream; 1/2 cup (125 mL) shredded mozzarella cheese; 2 tbsp (30 mL) thinly sliced fresh basil; 1/4 tsp (2 mL) salt; 1/4 tsp (2 mL) pepper

10

Prep Time Minutes
40
Total Time Minutes
12
Number of Ingredients
6
Servings

Tags:

Fall,
Sauce/Dressing/Condiment,
Side Dish,
Appetizer,
Oven,
Spring

Ingredients

1 large red onion, cut into wedges
6 whole cloves garlic
2 tbsp (30 mL) olive oil
1 can (283 g) Ro*Tel® Original Diced Tomatoes & Green Chilies, drained well
1 tbsp (15 mL) lemon juice
1 cup (250 mL) grated Parmesan cheese
1/2 cup (125 mL) mayonnaise
1/2 cup (125 mL) sour cream
1/2 cup (125 mL) shredded mozzarella cheese
2 tbsp (30 mL) thinly sliced fresh basil
1/4 tsp (2 mL) salt
1/4 tsp (2 mL) pepper

Directions

View photos

Step one

Preheat oven to 450˚F (230˚C). Toss together onion, garlic, oil, salt, pepper and Ro*Tel® Original Diced Tomatoes & Green Chilies. Arrange on parchment paper–lined baked sheet; bake for 15 to 20 minutes or until tender and charred. Let cool slightly. Decrease oven temperature to 350˚F (180˚C).
Step two

In blender or food processor, mix together roasted onion mixture and lemon juice to make smooth paste. Mix together Parmesan, mayonnaise, sour cream and mozzarella until well combined. Stir in onion mixture.
Step three

Transfer to oven-safe baking dish; bake for 15 to 20 minutes or until edges are bubbling. Let cool slightly. Sprinkle with basil.

Tips

For homemade crostini, slice a baguette into rounds. Preheat broiler to high and position rack in center of oven. Arrange baguette slices in a single layer on a baking sheet; broil for 1 to 2 minutes per side until golden and toasted. Brush with olive oil.