Chill the heart so that it is partially frozen. Slice heart into 1/4 inch slices, discarding any tough white tissue along the way.
Place slices into sealable container. Mix all the other ingredients together, and then pour over the heart to coat evenly. Marinate in fridge overnight.
Strain the beef and lay the cuts evenly throughout a food dehydrator. Dehydrate for 8 hours at 190 degrees Fahrenheit. Rotate the trays and flip pieces through the process to ensure even dehydration.
With about an hour left, melt the coconut oil in a sauté pan over medium heat and toast the sesame seeds until they turn golden brown. Brush the oil and sesame seeds over the jerky, then sprinkle with salt. Allow for 30 more minutes of dehydration to finish the jerky.