Cauliflower Tacos

0 Heat oven to 400°F.
1 Toss cauliflower florets with oil and taco seasoning.
2 Spread out on a sheet pan.
3 Roast cauliflower, shaking the pan halfway through cooking, until cauliflower is tender and golden, 25 to 30 minutes. 
4 While cauliflower cooks, make avocado crema.
5 Combine avocados, cilantro, sour cream, salt, water, and lime juice in a food processor. 
6 Blend until smooth.
7 Add more water, if needed, until the crema is still thick but pours easily off a spoon.
8 Taste the crema and add some more lime juice or salt, if needed. If you’d like some spice add a pinch of cayenne pepper or some hot sauce. 
9 When the cauliflower is done roasting, warm the tortillas.
10 You can do this by covering the tortillas with a slightly damp paper towel and microwave until warm, 15 to 20 seconds.
11 Alternatively, you can warm the tortillas over the burner of a gas stove for a few seconds on each side to lightly blacken them in spots.
12 Set out the cauliflower, tortillas, and toppings to assemble tacos at the table.