Create an image of a two-step process for making a butter sauce in a stainless steel pan. Left side: Show a rectangular block of butter melting in the pan. The butter is partially melted, with some solid portion remaining, and is surrounded by a pool of melted butter. The pan has a smooth, reflective surface, and the butter is starting to sizzle. Right side: Show the melted butter now fully liquid and beginning to bubble gently. The butter has turned a light golden color and is starting to form small bubbles, indicating it is hot and ready for the next step. The pan remains the same, with the reflective surface and smooth edges. The background for both images is a neutral, slightly blurred surface, focusing attention on the butter melting process. The lighting is bright and even, highlighting the different stages of the butter melting and bubbling.