Preheat oven to 425º.
If raw, toast pepitas in a dry skillet on the stovetop over medium flame until golden and popping. Remove from heat. In a small food processor or blender, combine all ingredients for cilantro pepita dressing, and blend until you they reach the texture of a mostly blended but slightly chunky dressing. Set aside.
Shuck corn, break each cob in half, and stand upright on a cutting board to slice kernels off cob. Maintain as many corn clusters as you can.
On a large baking sheet, toss fresh corn with sliced shallot, sliced jalapeño, ground coriander, ground cumin, and sea salt. Drizzle with ¼ cup olive oil and toss to coat. Distribute evenly on the pan.
Roast corn for 10 minutes, then remove from oven and turn broiler to high. While broiler heats up, use a spatula to turn over kernels and redistribute evenly. Once broiler is ready, return baking sheet to oven on shelf closest to broiler. Broil for 2-4 minutes, checking at 2 to make sure nothing is burning.
Full disclosure: At 4 minutes, a couple kernels actually popped—not dangerous, but definitely an alarming sound.
Remove from oven and let cool for 10-15 minutes. Then add manchego, baby kale (or greens of choicand sliced radishes, toss with cilantro pepita dressing, and top with any remaining toasted pepitas.