Heat control: for milder heat, remove seeds and membranes from fresh jalapeños and use mild canned; for hotter, keep some seeds or add a pinch of cayenne. Brighten with a squeeze of lime or chopped cilantro after baking. Make ahead: assemble up to 1 day in advance, cover, and chill; if baking from cold, add a few minutes. Store leftovers covered and reheat gently, stirring to restore creaminess. Serving ideas: garnish with jalapeño rounds, extra green onion, and paprika; spread leftovers on toast or in a quesadilla for a quick snack.