Chicken
1lb/500g chicken thigh fillets (skinless and boneless)
2½ tbsp kecap manis (thick sweet soy sauce - see Note 1)
1 tbsp unsalted butter, melted
12 - 14 small bamboo skewers, soaked in water for at least 30 minutes
Peanut Sauce
1 tbsp cooking oil (peanut, canola, vegetable)
2 garlic cloves, minced
1 small or ½ large onion, diced (red, brown, yellow or white)
3 birds eye chillis, sliced (or sub with hot sauce)
½ cup peanut butter (smooth or crunchy)
1 cup coconut milk (full fat is better, but light is ok)
2½ tbsp kecap manis (Note 1)
½ tbsp soy sauce
½ tsp salt
¼ cup crushed unsalted roasted peanuts (buy crushed or chop your own)
1 - 2 tbsp fresh lime juice
Garnish (optional)
Crushed peanuts
Lime wedges
Sliced shallots/scallions
INSTRUCTIONS
Chicken
Cut the chicken into 1.5cm/0.5" cubes. Thread onto skewers - 4 to 5 pieces per skewer.
Combine kecap manis and butter, then brush onto chicken.
Cook the skewers on a hot BBQ (outdoor grill) or on the stove in a large non stick fry pan (add a splash of oil, and make sure the skewers will fit in the pan). Grill/broiler would also work.
Serve, garnished with crushed peanuts, shallots and with lime wedges and Peanut Sauce on the side.
Peanut Sauce
Heat oil in a small saucepan over medium high heat. Add garlic, onion and chillis and cook for 3 minutes until onion is translucent.
Turn heat down to medium, then add peanut butter, coconut milk, kecap manis and soy sauce. Simmer for 10 minutes, whisking occasionally.
Use a handheld stick to puree (so the onion and chilli blends throughout the sauce - this is key). (See Note 2 for blending instructions) Stir through crushed peanuts and lime juice and simmer for 2 minutes. Allow to cool slightly before serving or to room temperature - it will thicken.
NOTES
1. Kecap Manis is a thick soy sauce that has the consistency of syrup. It can be found in the Asian or sauce section of supermarkets and it is cheap - in Australia, it is $2 for a small bottle or $4 for a very large one. It tastes like sweet soy sauce with smokiness, and it is a key ingredient in this recipe. It's the secret ingredient in 90% of Indonesian recipes!
2. If you puree in a blender, make sure the sauce cools before you blend it. Otherwise it will literally "explode" when you start whizzing it and sauce will splatter everywhere. I made this mistake. :)
3. I find that the traditional recipe for Indonesian satay peanut sauce does not come out smooth and rich like you get at restaurants, it comes out a bit gritty, like it has desiccated coconut in it (which it does not). It may be because peanuts in Australia are different. Also, it requires considerable effort to ground the peanuts into a paste (food processor does not work). So this recipe is one I created using peanut butter. It is heavily flavoured with other ingredients so it tastes just like what you get at restaurants.
Here is an authentic Indonesian Peanut Sauce recipe if you want to give it a go: 100g roasted unsalted peanuts, 3 to 5 birds eye chillies, 50 ml kecap manis, 3 shallots/scallions, sliced and 1 tbsp lime juice. Ground all ingredients together, season to taste then serve.
4. This recipe makes more Peanut Sauce than you will need. It is hard to make a smaller batch. It goes great with steamed vegetables and rice, and lasts for at least a week in the fridge (it should last longer, but I think the flavour might fade). Freshen up leftover peanut sauce with a squeeze of fresh lime juice.