For the sausage: cook in a 400°F oven to an internal temperature of 160°F using a thermometer.
Bring a saucepan to a boil over medium-high heat. Once boiling, gently lower the eggs into the water using a slotted spoon and cook for 6 minutes. Drain well and fill the saucepan with tap water. Let the eggs sit in the water for 5 minutes before peeling them.
Toast the bread. Spread with butter then jam.
Mash the eggs in a bowl and season with salt and pepper.