Spread bread cubes in a single layer on a baking sheet. Place into oven and bake until crisp and golden, about 4-5 minutes; set aside.
Melt butter in a large skillet over medium high heat. Add garlic, onion, carrots and celery. Cook, stirring occasionally, until tender, about 3-4 minutes. Stir in sage, thyme and rosemary until fragrant, about 1 minute.
Stir in bread cubes and gently toss to combine. Stir in chicken stock and parsley; cover and remove from heat. Let sit for 10 minutes.