Roasted Brussels Sprouts Gratin - VeryVera

Ingredients

• 1 1/4 lb Brussels sprouts, trimmed
• 3 tbsp. extra-virgin olive oil
• 4 cloves garlic, divided and minced
• Kosher salt, to taste
• Freshly ground black pepper, to taste
• 1 c peeled and chopped carrots
• 8 slices bacon
• 1 tbsp. unsalted butter
• 1/4 c minced shallots
• 1 tbsp. all-purpose flour
• 1 1/2 c finely grated Parmesan cheese, divided
• 1 c heavy cream
• 1 tbsp. coarse-ground mustard
• Dash of crushed red pepper flakes
• 1/4 c panko breadcrumbs