Kentang Tumbuk Kembang Kol dengan Kuah Jamur

Bahan-bahan (4 porsi)

• 4 ounces white or cremini mushrooms (chopped) ((4 ounces equals ~3/4 one small container))
• 3 Tbsp vegan butter ((divided))
• 1 Tbsp minced shallot ((optional))
• 1 cup veggie stock (DIY or store-bought)
• 2 heaping Tbsp unbleached all-purpose flour ((sub all purpose gluten-free flour or cornstarch for GF option))
• 1 pinch each salt, pepper, and dried or fresh thyme ((chopped))
• 5 red skin potatoes ((washed and scrubbed))
• 1/3 head cauliflower ((chopped))