pre-heat oven to 350˚
generously grease 8 mini loaf pans or a 9X13, set aside
toss chopped rhubarb with a Tablespoon of sugar
beat the rest of the sugar with the softened butter, scrape down the sides of the bowl as needed
add vanilla
mix in the eggs
stir the dry ingredients together
add 1/3 buttermilk and 1/2 dry ingredients to the butter and egg mixture, and mix gently
repeat
add the last of the buttermilk and stir well, do not beat
add a scoop of batter to the bottom of each loaf pan, tilt to cover the bottom
divide the rhubarb between the pans, and sprinkle a little in each pan until it's used up
divide the rest of the batter evenly between the pans
divide the streusel over the tops of the bread, press lightly to adhere the streusel
bake in a 350˚ for 40-45 minutes
test for doneness at 40 minutes using a toothpick, it should come out moist but clean
if it isn't done, bake another 5 minutes, and repeat with the toothpick