Roasted Cauliflower With Turmeric Sauce

Name: Roasted Cauliflower With Turmeric Sauce
Ingredients: 1 large head of cauliflower (about 2½ lb.), cored, cut into large florets; 1 Tbsp. extra-virgin olive oil, plus more for drizzling; Kosher salt; 5 garlic cloves, finely grated; 1 2½ piece ginger, peeled, finely grated; 2 tsp. ground turmeric; 1 13.5-oz. can unsweetened coconut milk; 1 Tbsp. fish sauce; 2 tsp. (or more) honey; 1 Fresno chile, thinly sliced; Store-bought fried onions and toasted unsweetened coconut flakes (for serving)