This is not your bubbie's latke. The use of cauliflower lightens up the recipe, while the cheese and jalapeno add richness and sharpness to the otherwise simple flavor. I recommend making them on the thinner side so they cook through without burning on the outside.
Preheat your oven to 400°F. Toss the cauliflower and onion with the olive oil and place on parchment paper lined sheet pan. Roast until the cauliflower starts to brown.
Add the cauliflower and onion to the food processor and process until smooth but not liquid.
Move mixture to a large mixing bowl and incorporate mix in the flour, cheese, eggs, jalapeno, salt, and pepper, stirring until all the ingredients are evenly distributed.
Add about a 1/2 inch of oil in a large frying pan or skillet, and place over medium heat.
Form patties of your desired size and fry on each side until golden brown.