Jalapeños cleaned and soaked overnight in salty water will knock down about half the kick.
I stuff em with cream cheese and wrap in a half slice of bacon, then bake at 400 for 25 minutes in a heavy pan.
My wife did the seed cleaning and soaking with Thai chilies when she first began to react poorly to hot food but still loved the flavor. It worked. Your jalapeño recipe sounds good. I’m tempted.