In a big pan over medium heat, cook bacon and lard for a minute or two. Add onions and cook until translucent.
Turn the heat off and/or remove the pan from the heat. Add paprika and stir well. It's important to do this off the heat as paprika burns easily.
Add tomatoes, peppers and salt and return to the heat. Cover and simmer over medium-low heat for about 25-30 minutes.
Add sausage and cover again, simmering for 10 minutes.
Now, I like to thicken the lecso by uncovering and simmering for an additional 15 minutes or so until the tomatoes have lost most of the liquid. (But some people like it runnier to sop bread on!)
Recipe by Enjoy Tribute at https://enjoytribute.com/hungarian-lecso/