Preheat the oven and prepare a baking dish as needed.

In a skillet, cook the chopped bacon until crispy. Remove and set aside.

In the same skillet, add olive oil, onion, and garlic; sauté until onions are translucent.

Add cauliflower florets to the skillet and stir to combine.

In a separate saucepan, whisk together almond milk and flour until smooth over medium heat until it begins to thicken.

Remove from heat and stir in cheddar cheese, parmesan cheese, and salt until melted.

Combine the cheese sauce with the cauliflower and bacon, mixing well.

Pour the mixture into the prepared baking dish and top with chopped chives.

Bake in the preheated oven for 30 minutes or until golden and bubbly.