Dinner · Part 2 of 3: Instructions
Sweet Pepper Dijon Cream Pork Sirloin Roast Step-by-step instructions

- Prep
- Cook
- Total
- Serves
- 6
Before you start
Before you start, make sure the slow cooker is clean and ready. Slice the bell peppers into thick strips (about 1/2-inch wide) and the onion into thin wedges.
Measure out the sour cream, mustard, and au jus. There’s no need to pre-cook anything—this is a true dump-and-go recipe. If you have time, pat the pork dry with paper towels, but it’s not essential.
Ingredients at a glance (6)
- 3 1/2 lb boneless pork sirloin roast
- 2 bell peppers (red and green), sliced into thick strips
- 1 sweet yellow onion, sliced
- 1/2 cup sour cream
- 1/4 cup coarse whole-grain Dijon mustard
- 1 cup au jus
Instructions
Layer and Top
- Layer the Roast and VegetablesPlace the pork sirloin roast in the center of the slow cooker insert. Scatter the sliced bell peppers and onion over and around the roast, tucking some underneath for even cooking.Look for The roast sits in the middle, surrounded by colorful peppers and onion slices.Tip Cut the peppers into thick strips so they hold their texture during the long cook.
- Add the Creamy Mustard MixtureIn a small bowl, stir together the sour cream and whole-grain Dijon mustard. Dollop the mixture over the top of the roast and vegetables, spreading it slightly with a spoon.Look for The roast is topped with creamy white and yellow dollops.Tip No need to mix it in—the slow cooker will blend it as it melts.
- Pour in the Au JusPour the au jus along the side of the slow cooker, being careful not to wash the mustard mixture off the top of the roast. The liquid should come about a quarter of the way up the roast.Look for The au jus pools around the roast, leaving the creamy topping intact.Tip Pouring along the side prevents disturbing the sour cream and mustard layer.
At this stage, the slow cooker contains a neat pile of pork, peppers, and onions, topped with creamy mustard dollops and surrounded by a shallow pool of au jus. The colors are vibrant: ruby pork, red and green peppers, yellow onion, and white sour cream. It looks fresh and appetizing, ready to cook.
Slow Cook and Shred
- Cover and Cook on LowCover the slow cooker and cook on low for 8 to 10 hours, until the pork is fork-tender and shreds easily. Avoid opening the lid during the first few hours to maintain heat. Let it rest for 3 minutes before slicing.Look for The aroma of pork, peppers, and mustard fills the kitchen.Safe temperature 145°F (63°C) internal temperature (steaks, chops and roasts)Tip If time is short, cook on high for 4 to 5 hours, but low is gentler for shredding.
- Shred the PorkUsing two forks, shred the pork directly in the slow cooker, mixing it with the peppers and onions. The meat should pull apart with little resistance.Look for The pork separates into tender strands, coated in a creamy, peppery sauce.Tip Remove any large pieces of fat before shredding for a cleaner texture.
After 8 hours, the kitchen smells of savory pork, sweet peppers, and tangy mustard. The pork is deeply browned and falling apart. When you insert a fork, it twists easily.
The sauce has turned a warm golden color, with creamy swirls. Shred the meat and stir it into the sauce—it looks glossy and rich.
Serve
- Serve and EnjoySpoon the shredded pork, peppers, and creamy gravy over steamed rice or your favorite sides. Serve hot.Look for The dish is glossy, creamy, and steaming.Tip For extra brightness, a sprinkle of fresh parsley or chives works well, if desired.
The final dish is a mound of shredded pork, tangled with soft pepper strips and onion, all coated in a creamy, golden gravy. Steam rises from the bowl. The texture is moist and tender, and the sauce is thick enough to cling to the meat but still saucy. It’s ready to be spooned over rice or potatoes.
Common mistakes
A common mistake is lifting the lid too often during cooking, which lets heat escape and extends the cooking time. Another is using too much liquid—the au jus should only come partway up the roast, not cover it.
Also, don’t skip the resting time after shredding; letting the meat sit in the sauce for a few minutes helps it absorb more flavor.
How to tell it’s done
The pork is done when it reaches an internal temperature of 145°F (63°C) and is fork-tender—it should shred easily with little resistance.
Because the slow cooker cooks on low for 8 to 10 hours, it will far exceed that temperature, ensuring safety and tenderness. If the meat is still tough after 8 hours, continue cooking for another hour or two.
- Steaks, chops and roasts: 145°F (63°C) in the thickest part, then a 3-minute rest
Up next · Part 3 of 3
4 variations · storage & make-ahead · 5 answers · printable card
Tips, FAQ & printable recipe (Part 3)← Back to the ingredients (Part 1)