The phrase "good spread" means that something is well distributed or evenly spread out. It suggests that there is a balanced or equal distribution of something. Full definition
In fact, I'm thinking this would be a pretty good spread for toast, am I right? (eluxemagazine.com)
Serve small or chopped berries as finger foods, or blend them in the blender for a scrumptious puree that's as good spread on toast as it is off a spoon. (parents.com)
It was so delicious on its own but also good spread with hummus and topped with pickles. (ourkitchen.fisherpaykel.com)