In a sauté pan heat the butter on med high until it starts to bubble, then add in the pearl couscous and stir around for 2-4 minutes lightly sautéing the pasta spheres. The butter will brown during this process as well. Once toasted, pour in the water and ¼tsp (.6g) of salt, turn the heat down to low, and cover. Cook the pasta to al dente (10-12 minutes).
Once cooked, pour into a large serving bowl to cool, drizzle 2tbsp (30ml) olive oil over the pasta, and toss to coat. Give the pasta salad a toss every 10 minutes or so moving forward to promote cooling and stop clumping.
Next, preheat your oven to 425°F (218°C).
While the oven is preheating, chop up your turnips and radishes into ½in (1.25cm) cubes and lightly oil and salt them with the remaining amount of these ingredients. Put the chopped vegetables on a 13x18in (33x45.5cm) baking tray and place them into the oven. (bonus points if you use a silpat to keep everything from sticking to the pan)
Bake for 25-30 minutes. You want them to be just fork tender.
Prepare a second 13x18in (33x45.5cm) baking tray for the bacon by covering it in aluminum foil and setting a cooling rack onto the covered pan. Then place strips down on the rack and put them into the oven at the same temperature.
The bacon should be crispy in about 15-25 minutes, depending on the thickness, but keep an eye on it. Bacon can go from crisp to charcoal really quick when you are not paying attention.
If you plan to make the green goddess dressing from scratch (recipe takes 15 minutes max), make it now while the veggies and bacon are in the oven. Once the veggies and bacon are out of the oven, let them cool on the counter for 10-15 minutes.
While they cool, halve the tomatoes, grate the parmesan, and give the arugula a rough chop. Once cool, chop up the bacon into small pieces and set that aside as well.
Start assembling the pasta salad by adding all of the ingredients into the bowl and giving them a gentle mix. Once combined, add the dressing and toss to coat.