Preheat oven to 375°. Line a rimmed baking sheet with foil.
Trim 2 inches off ends of Broccolini. If stalks are thick, cut stalks in half lengthwise. Place on prepared pan, and add shallot, oil, ½ teaspoon salt, and pepper, tossing to coat. Spread into a single layer.
Bake until Broccolini stalks are fork-tender, 15 to 20 minutes.
Meanwhile, in a small saucepan, melt butter over medium-high heat. Cook, swirling pan occasionally, until bubbles subside and butter solids begin to brown on bottom of pan, 3 to 5 minutes. Add garlic and remaining ¼ teaspoon salt, and cook until fragrant, about 30 seconds. Stir in lemon juice. Drizzle onto Broccolini; toss well. Sprinkle with pecans.
Recipe by Louisiana Cookin' at https://louisianacookin.com/roasted-broccolini-browned-butter/