Cheesy Cauliflower & Kale Baked Rigatoni with Sage Breadcrumbs

INGREDIENTS

head Cauliflower

2 cups

Kale, packed

4 tsp

Sage, leaves

1/4 cup

Shallots

1 lb

Rigatoni, gluten-free

1/4 tsp

Black pepper, freshly ground

1/2 tsp

Kosher salt

3 tbsp

White rice flour, sweet

3/4 cup

Sourdough or other bread, gluten-free

1 tbsp

Butter

6 tbsp

Butter, unsalted

3 1/2 cups

Whole milk

1/2 cup

Water

6 ounces grated Roth Organic Sharp Cheddar

8 ounces grated Roth Organic Grand Cru, divided (Grand Cru really is the best, but if you can't find it, you can sub in gruyere in a pinch)