Goat's Cheese Frittata Sandwiches with Caramelised Red Onion Chutney

Name: Goat's Cheese Frittata Sandwiches with Caramelised Red Onion Chutney
Prep time: 20 min
Cook time: 1 h 15 min
Total time: 1 h 15 min
Yield: 6 portion
Ingredients: 45 gram olive oil; 500 gram red onion; 200 gram soft brown sugar; 2 teaspoon salt; 200 gram red wine vinegar; 150 gram mushroom, fresh; 50 gram baby spinach, fresh; 6 egg, European medium (53-63 g) (from chicken); 45 gram cow milk; 5 gram chive, fresh; ¾ teaspoon black pepper, ground; 80 gram goat's cheese, soft; 500 gram water; 2 - 3 tablespoon butter, unsalted (from cows' milk); 1 garlic clove; 2 baguette; 12 slice back bacon, sliced; 12 tablespoon cream cheese; 6 slice tomato